Description / Abstract:

The purpose of this International Standard is to evaluate, by
means of soft body impactors, safe breakage characteristics of
glazing products intended to reduce cutting and piercing injuries
to persons through accidental impact.

This International Standard examines test methods currently
employed to determine the pendulum impact performance of safety
glass. Use of the methodologies in this International Standard
improves the reproducibility of test results and gives a common
basis of classification. The aim is for the performance of glass
products manufactured and tested in various countries to be better
understood and more consistent.

Two types of soft body impactors are defined. The traditional
shot bag impactor is detailed both in terms of manufacture and
maintenance in an attempt to overcome problems associated with such
impactors becoming misshapen. The twin tyre impactor is also
detailed.

The test equipment, excluding the impactor, is also described. A
method of calibrating the test frame is given. The benefit of
calibrating the test equipment is the increased reproducibility of
the test results.

Classification of glass products is also detailed. The
classification system allows information on the following to be
given:

a) the maximum drop height at which the glass either did not
break or broke safely, i.e. in a manner similar to laminated glass
or toughened glass;

b) the manner in which the glass would break, i.e. as toughened
glass, laminated glass, annealed glass, irrespective of whether or
not the glass was broken during the test;

c) the maximum drop height at which the glass either did not
break or broke safely, i.e. in a manner similar to laminated
glass.

This International Standard does not specify the intended use of
the products, but provides a method of classification in terms of
the performance of the materials being tested. The impact energy
used for the various levels of classification are designed to
provide the intended user or the legislator with the information to
assist in defining the level of safety and protection required
relative to the intended location at which the selected safety
glass is to be used.